the acute angle between two lines such that the direction cosines l, m, n of each of them satis...
87 views · Published 11 October 2018 · 2:58 · Indexed 28 September 2026
Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW the acute angle between two lines such that the direction cosines l, m, n of each of them satisfy the equations `l + m + n = 0` and `l^2 + m^2 - n^2 = 0` is
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